物理化学学报2020，Vol.36Issue(5)：12-17,6.DOI:10.3866/PKU.WHXB201905015
基于聚碳酸丙烯酯基聚合物电解质和有机正极的全固态钠电池
Poly(propylene carbonate)-based Polymer Electrolyte with an Organic Cathode for Stable All-Solid-State Sodium Batteries
摘要
Abstract
Sodium-ion batteries (SIBs) are promising candidates to replace lithium-ion batteries (LIBs) to meet the emergent requirements of various commercial applications.SIBs and LIBs are similar in many aspects,including their reduction potentials,approximate energy densities,and ionic semidiameters.Analogously,safety issues,including liquid leakage,high flammability,and explosiveness limit the usage of SIBs.All-solid-state batteries have the potential to solve the aforementioned problems.However,polycarbonates as promising solid electrolytes have been rarely exploited in all-solid-state SIBs.In addition,organic electrode materials,including non-conjugated redox polymers,carbonyl compounds,organosulfur compounds,and layered compounds,have been intensively investigated as part of various energy storage systems owing to their low cost,environmental friendliness,high energy density,and structural diversity.Nevertheless,the dissolution of small organic compounds in organic-liquid electrolytes has hindered its further applications.Fortunately,the utilization of solid polymer electrolytes combined with organic electrode materials is a promising method to prevent dissolution into the electrolyte and improve the cycling performance of SIBs.Thus,we proposed the utilization of a poly(propylene carbonate) (PPC)-based solid polymer electrolyte and cellulose nonwoven with a 3,4,9,10-perylenetetracarboxylicacid-dianhydride (PTCDA) cathode in an all-solid-state sodium battery (ASSS).The solid electrolyte significantly enhanced the safety of the SIB and was successfully synthesized via a facile method.The morphology of the as-prepared solid electrolyte was examined by electron scanning microscopy (SEM).Furthermore,the electrochemical performances of the PTCDA/Na battery with organic-liquid and solid electrolytes at room temperature were compared.The SEM results demonstrated that the solid polymer electrolyte and sodium bis(fluorosulfonyl)imide (NaFSI) were evenly distributed inside the pores of the nonwoven cellulose.The ionic conductivity of the composite solid polymer electrolyte (CSPE) at room temperature was 3.01 x 10-5 S·cm-1,suggesting that the CSPE was a promising candidate for commercial applications.In addition,the ASSS showed significantly improved cycling performance at a current density of 50 mAh·g-1 with a high capacity retention of 99.1％,whereas the discharge capacity of the liquid PTCDA/Na battery was only 24.6mAh·g-1 after 50 cycles.This indicated that the cycling performance of the PTCDA cathode in the SIB was largely improved by preventing the dissolution of the PTCDA cathode material in the electrolyte.Electrochemical impedance spectroscopy results demonstrated that the CSPE was compatible with the organic cathode electrode.关键词
全固态电池/聚碳酸丙烯酯/3,4,9,10-苝四甲酸二酐/有机正极/高安全性Key words
All-solid-state battery/Poly(propylene carbonate)/3,4,9,10-perylene-tetracarboxylicacid-dianhydride/Organic cathode/High safety分类
化学化工引用本文复制引用
费慧芳,刘永鹏,魏传亮,张煜婵,冯金奎,陈传忠,于慧君..基于聚碳酸丙烯酯基聚合物电解质和有机正极的全固态钠电池[J].物理化学学报,2020,36(5):12-17,6.基金项目
The project was supported by the Shandong Provincial Natural Science Foundation,China (ZR2017MB001),the Young Scholars Program of Shandong University,China (2016WLJH03),the Project of the Taishan Scholar,China (tsqn201812002,ts201511004) and the Guangdong Special Funds for Public Welfare Research and Capacity Building,China (2017A020211022,2017A010102001).山东省自然科学基金(ZR2017MB001),山东大学青年学者项目(2016WLJH03),泰山学者项目(tsqn201812002和ts201511004),广东省公益研究与能力建设专项资金(2017A020211022和2017A010102001)资助 （ZR2017MB001）
